In this paper,a new control scheme of a proportional resonant（PR） ＋ harmonic compensation（HC） combined with current state feedback for an Active Voltage Quality Regulator（AVQR） is proposed.The current state feedback loop is used to actively increase the damping factor to eliminate the peak amplitude at resonant frequency of LC filter system,as well as enhanced the stability of system.Meanwhile,the load current feed forward loop is implemented to compensate the voltage drop due to the state feedback loop and suppress the load disturbance.A combined PR and harmonic compensation control structure is added into the outer voltage loop to achieve zero steady-state error and compensate harmonics,which come from the source,power inverter and nonlinear load.The theory analysis and simulation of the proposed method are investigated in detail.Laboratory experiments are carried out on a single-phase 2kVA AVQR system.The simulation and experimental results verify the feasibility and effectiveness of the proposed controller.%提出了一种基于电流状态反馈的比例谐振和谐波补偿的串联有源电压质量调节器控制方法。外环采用比例谐振控制器,并与谐波补偿器相结合,使系统具有谐波补偿能力;内环采用电感电流状态反馈,降低系统的谐振峰,并且增强系统的稳定性;同时,引入了负载电流前馈来增强系统对负载扰动的抑制能力。论文对所提出的控制方法进行了详细的理论和仿真分析,并在单相2kVA串联有源电压质量调节器实验装置上进行了验证。仿真和实验结果均证明了所提控制方法的正确性和有效性。
展开▼
